Question

我有两个数组，我需要在删除行时删除数据，并且两者似乎都删除了。但是，当我滑动删除时，我收到以下错误：

[2078:568325] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit/UIKit-3318.16.21/UITableView.m:1582 [2078:568325] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (2) must be equal to the number of rows contained in that section before the update (2), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).'

func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    return true
}

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {

    if editingStyle == UITableViewCellEditingStyle.Delete {
        audioPlayers[indexPath.row].stop()
        audioFiles.removeAtIndex(indexPath.row)
        audioPlayers.removeAtIndex(indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
    }

}

似乎在deleteRowsAtIndexPaths上出错了。

Answer 1

在从数据模型中删除元素之前，尝试移动调用以删除行。像这样：

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {

    if editingStyle == UITableViewCellEditingStyle.Delete {
        audioPlayers[indexPath.row].stop()
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
        audioFiles.removeAtIndex(indexPath.row)
        audioPlayers.removeAtIndex(indexPath.row)
    }

}

Answer 2

我就像

一样

        override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
        if editingStyle == .Delete {
            managedObjectContext.deleteObject(fetchedResultsController.objectAtIndexPath(indexPath) as! NSManagedObject)
            do {
                try managedObjectContext.save()
            } catch {
                print("error managed object context in dictionary table")
            }
        } else if editingStyle == .Insert {

        }    
    }
  func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
        switch type {
        case NSFetchedResultsChangeType.Insert:
            tableView.insertRowsAtIndexPaths([newIndexPath!], withRowAnimation: .Fade)
        case NSFetchedResultsChangeType.Delete:
            tableView.deleteRowsAtIndexPaths([indexPath!], withRowAnimation: .Fade)
        case NSFetchedResultsChangeType.Move:
            tableView.deleteRowsAtIndexPaths([indexPath!], withRowAnimation: .Fade)
            tableView.insertRowsAtIndexPaths([newIndexPath!], withRowAnimation: .Fade)
        case NSFetchedResultsChangeType.Update:
            tableView.cellForRowAtIndexPath(indexPath!)
        }
    }

    func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: NSFetchedResultsChangeType) {
        switch type {
        case NSFetchedResultsChangeType.Insert:
            tableView.insertSections(NSIndexSet(index: sectionIndex), withRowAnimation: .Fade)
        case NSFetchedResultsChangeType.Delete:
            tableView.deleteSections(NSIndexSet(index: sectionIndex), withRowAnimation: .Fade)
        case NSFetchedResultsChangeType.Move:
            tableView.deleteSections(NSIndexSet(index: sectionIndex), withRowAnimation: .Fade)
            tableView.insertSections(NSIndexSet(index: sectionIndex), withRowAnimation: .Fade)
        case NSFetchedResultsChangeType.Update:
            break
        }
    }

无法删除UITableView中的行

2 个答案: